CI: if multi-threaded build fails, try single threaded

Author: uyjulian

.github/workflows/compilation.yml

@@ -24,7 +24,8 @@ jobs:
       - name: Compile project ${{ matrix.debug }}
         run: |
           make -j $(getconf _NPROCESSORS_ONLN) clean
-          make -j $(getconf _NPROCESSORS_ONLN) ${{ matrix.debug }}
+          make -j $(getconf _NPROCESSORS_ONLN) ${{ matrix.debug }} || make clean
+          make -j ${{ matrix.debug }}
           make -j $(getconf _NPROCESSORS_ONLN) install
           # Create symbolink links using relative paths
           (cd $PS2DEV/ee/mips64r5900el-ps2-elf/lib && ln -sf ../../../ps2sdk/ee/lib/libcglue.a libcglue.a && cd -)