CI: Hash only relevant files for the key of the compiler cache

In the last few commits, a second patch was added to the LLVM toolchain,
and it no longer uses our binutils patch. This commit changes the CI
cache keys accordingly, in order to prevent unnecessary rebuilds of both
toolchains when only one is changed.

The Clang toolchain's cache now only takes into account patches that
begin with `llvm`, and the GNU toolchain excludes those from the hash
calculation. We now also hash the two CMake cache files that we use for
building LLVM and its runtime libraries.

.github/workflows/cmake.yml

@@ -73,8 +73,8 @@ jobs:
           # *and* as actual output variable, in this order.
           message("  set-output name=time::${current_date}")
           message("::set-output name=time::${current_date}")
-          message("  set-output name=libc_headers::${{ hashFiles('Userland/Libraries/LibC/**/*.h', 'Userland/Libraries/LibPthread/**/*.h', 'Toolchain/Patches/*[!llvm].patch', 'Toolchain/BuildIt.sh') }}")
-          message("::set-output name=libc_headers::${{ hashFiles('Userland/Libraries/LibC/**/*.h', 'Userland/Libraries/LibPthread/**/*.h', 'Toolchain/Patches/*[!llvm].patch', 'Toolchain/BuildIt.sh') }}")
+          message("  set-output name=libc_headers::${{ hashFiles('Userland/Libraries/LibC/**/*.h', 'Userland/Libraries/LibPthread/**/*.h', 'Toolchain/Patches/[!llvm]*.patch', 'Toolchain/BuildIt.sh') }}")
+          message("::set-output name=libc_headers::${{ hashFiles('Userland/Libraries/LibC/**/*.h', 'Userland/Libraries/LibPthread/**/*.h', 'Toolchain/Patches/[!llvm]*.patch', 'Toolchain/BuildIt.sh') }}")
 
       - name: Toolchain cache
         # TODO: Change the version to the released version when https://github.com/actions/cache/pull/489 (or 571) is merged.

Meta/Azure/Caches.yml

@@ -18,13 +18,13 @@ steps:
     - ${{ if eq(parameters.toolchain, 'clang') }}:
       - task: Cache@2
         inputs:
-          key: '"toolchain" | "x86_64" | Toolchain/BuildClang.sh | Toolchain/Patches/*[!gcc].patch | Userland/Libraries/LibC/**/*.h | Userland/Libraries/LibPthread/**/*.h'
+          key: '"toolchain" | "x86_64" | Toolchain/BuildClang.sh | Toolchain/Patches/llvm*.patch | Toolchain/CMake/*.cmake | Userland/Libraries/LibC/**/*.h | Userland/Libraries/LibPthread/**/*.h'
           path: $(Build.SourcesDirectory)/Toolchain/Cache
         displayName: 'Toolchain Prebuilt Cache'
     - ${{ if eq(parameters.toolchain, 'gcc') }}:
       - task: Cache@2
         inputs:
-          key: '"toolchain" | "${{ parameters.arch }}" | Toolchain/BuildIt.sh | Toolchain/Patches/*[!llvm].patch | Userland/Libraries/LibC/**/*.h | Userland/Libraries/LibPthread/**/*.h'
+          key: '"toolchain" | "${{ parameters.arch }}" | Toolchain/BuildIt.sh | Toolchain/Patches/[!llvm]*.patch | Userland/Libraries/LibC/**/*.h | Userland/Libraries/LibPthread/**/*.h'
           path: $(Build.SourcesDirectory)/Toolchain/Cache
         displayName: 'Toolchain Prebuilt Cache'