Fix RNTester hermesc build issue on iOS

Author: janicduplessis

packages/react-native/sdks/hermes-engine/utils/build-hermesc-xcode.sh

@@ -10,9 +10,17 @@ hermesc_dir_path="$1"; shift
 jsi_path="$1"
 
 # This script is supposed to be executed from Xcode "run script" phase.
-# Xcode sets up its build environment based on the build target (iphone, iphonesimulator, macodsx).
+# Xcode sets up its build environment based on the build target (iphone, iphonesimulator, macosx).
 # We want to make sure that hermesc is built for mac.
 # So we clean the environment with env -i, and explicitly set SDKROOT to macosx
 SDKROOT=$(xcode-select -p)/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk
-env -i SDKROOT="$SDKROOT" "$CMAKE_BINARY" -S "${PODS_ROOT}/hermes-engine" -B "$hermesc_dir_path" -DJSI_DIR="$jsi_path"
-env -i SDKROOT="$SDKROOT" "$CMAKE_BINARY" --build "$hermesc_dir_path" --target hermesc -j "$(sysctl -n hw.ncpu)"
+
+env -i \
+  PATH="$PATH" \
+  SDKROOT="$SDKROOT" \
+  "$CMAKE_BINARY" -S "${PODS_ROOT}/hermes-engine" -B "$hermesc_dir_path" -DJSI_DIR="$jsi_path"
+
+env -i \
+  PATH="$PATH" \
+  SDKROOT="$SDKROOT" \
+  "$CMAKE_BINARY" --build "$hermesc_dir_path" --target hermesc -j "$(sysctl -n hw.ncpu)"