simplify the build-only job

Author: newpavlov

.github/workflows/tests.yml

@@ -118,16 +118,6 @@ jobs:
   build:
     name: Build-only
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        target: [
-          x86_64-sun-solaris,
-          x86_64-unknown-freebsd,
-          x86_64-fuchsia,
-          x86_64-unknown-netbsd,
-          x86_64-unknown-redox,
-          x86_64-fortanix-unknown-sgx,
-        ]
     steps:
       - uses: actions/checkout@v2
       - name: Install toolchain
@@ -138,7 +128,18 @@ jobs:
           toolchain: nightly
           components: rust-src
           override: true
-      - run: cargo build --target ${{ matrix.target }}
+      - name: Solaris
+        run: cargo build --target x86_64-sun-solaris
+      - name: FreeBSD
+        run: cargo build --target x86_64-unknown-freebsd
+      - name: NetBSD
+        run: cargo build --target x86_64-unknown-netbsd
+      - name: Fuchsia
+        run: cargo build --target x86_64-fuchsia
+      - name: Redox
+        run: cargo build --target x86_64-unknown-redox
+      - name: SGX
+        run: cargo build --target x86_64-fortanix-unknown-sgx
 
   build-rdrand:
     name: Build-only RDRAND