[CI] Fix LLVM target name

Author: banach-space

.github/workflows/apple-silicon-llvm-from-sources.yml

@@ -28,7 +28,7 @@ jobs:
           mkdir build && cd build
           cmake -G Ninja \
             -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_PROJECTS="clang" \
-            -DLLVM_TARGETS_TO_BUILD="host;X86_64" -DLLVM_OPTIMIZED_TABLEGEN=ON \
+            -DLLVM_TARGETS_TO_BUILD="host;X86" -DLLVM_OPTIMIZED_TABLEGEN=ON \
             ../llvm
           # Note that only the required tools are built
           ninja clang opt lli not FileCheck

.github/workflows/x86-ubuntu-llvm-from-sources.yml

@@ -31,7 +31,7 @@ jobs:
           ln -s /usr/bin/x86_64-linux-gnu-ld.gold ld
           cmake -G Ninja \
             -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_PROJECTS="clang" \
-            -DLLVM_TARGETS_TO_BUILD="X86_64;AArch64" -DLLVM_OPTIMIZED_TABLEGEN=ON \
+            -DLLVM_TARGETS_TO_BUILD="X86;AArch64" -DLLVM_OPTIMIZED_TABLEGEN=ON \
             ../llvm
           # Note that only the required tools are built
           ninja clang opt lli not FileCheck