add native methods from alpine-librdkafka.so

[SilverFox (zerda)]

Resolved #611

Like CentOS and Debian, the native library needs to be loaded from alpine-librdkafka.so not librdkafka.so.

/app # ldd /app/runtimes/linux-x64/native/librdkafka.so
	ldd (0x7f9189dcd000)
	libm.so.6 => ldd (0x7f9189dcd000)
Error loading shared library libsasl2.so.2: No such file or directory (needed by /app/runtimes/linux-x64/native/librdkafka.so)
	libssl.so.1.0.0 => /lib/libssl.so.1.0.0 (0x7f91897cc000)
	libcrypto.so.1.0.0 => /lib/libcrypto.so.1.0.0 (0x7f91893ad000)
	libz.so.1 => /lib/libz.so.1 (0x7f9189196000)
	libdl.so.2 => ldd (0x7f9189dcd000)
	libpthread.so.0 => ldd (0x7f9189dcd000)
	librt.so.1 => ldd (0x7f9189dcd000)
	libc.so.6 => ldd (0x7f9189dcd000)
Error loading shared library ld-linux-x86-64.so.2: No such file or directory (needed by /app/runtimes/linux-x64/native/librdkafka.so)
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: sasl_client_start: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: __fprintf_chk: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: __printf_chk: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: sasl_client_new: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: __poll_chk: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: sasl_dispose: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: __memcpy_chk: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: __vsnprintf_chk: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: sasl_errstring: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: sasl_client_init: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: __isnan: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: sasl_errdetail: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: __syslog_chk: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: sasl_getprop: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: sasl_listmech: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: __snprintf_chk: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: __strndup: symbol not found
Error relocating /app/runtimes/linux-x64/native/librdkafka.so: sasl_client_step: symbol not found

/app # ldd /app/runtimes/linux-x64/native/alpine-librdkafka.so
	ldd (0x7fe763b96000)
	libc.musl-x86_64.so.1 => ldd (0x7fe763b96000)

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[SilverFox (zerda)]

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[Matt Howlett (mhowlett)]

ha! that solves the problem of why people are still reporting this issue when I remember testing it - turns out i never merged my branch. thanks - will most likely add before 1.0.

[Matt Howlett (mhowlett)]

verified diff with NativeMethods.cs, checks out. thanks!

[anr (they/them) (justanr)]

Looks like this didn't make it into 1.0.0, any chance of a minor version release including it?