Unify PGO casing and skip LLVM on Skia cache hit

- Quote pgo matrix values in CI so "True" isn't coerced to a YAML boolean
- Move Install LLVM after cache restore so it only runs on cache miss
- Match Taskfile PGO default and FLAVOR comparison to CI's "True"

Author: chsbuffer

.github/workflows/build.yml

@@ -21,11 +21,11 @@ jobs:
           - arch: x64
             rid: win-x64
             hostlibs_flavor: default
-            pgo: True
+            pgo: "True"
           - arch: arm64
             rid: win-arm64
             hostlibs_flavor: default
-            pgo: True
+            pgo: "True"
 
     steps:
       - name: Checkout repository
@@ -100,16 +100,17 @@ jobs:
           fetch-depth: 1
           submodules: false
 
-      - name: Install LLVM
-        uses: ./.github/actions/install-llvm
-
       - name: Restore SkiaSharp cache
         id: cache_skia
         uses: actions/cache@v5
         with:
           path: artifacts\skiasharp
           key: skiasharp-windows-${{ matrix.rid }}-${{ hashFiles('native/skiasharp/**', 'scripts/libHarfBuzzSharp.vcxproj.in') }}
 
+      - name: Install LLVM
+        if: steps.cache_skia.outputs.cache-hit != 'true'
+        uses: ./.github/actions/install-llvm
+
       - name: Install Task
         if: steps.cache_skia.outputs.cache-hit != 'true'
         uses: ./.github/actions/install-task

Taskfile.yml

@@ -20,7 +20,7 @@ tasks:
     desc: Build and deploy HostLibs static libraries (ARCH=x64|arm64, PGO=true|false, SYSROOT=…)
     vars:
       ARCH: '{{.ARCH | default "x64"}}'
-      PGO: '{{.PGO | default "true"}}'
+      PGO: '{{.PGO | default "True"}}'
       SYSROOT: '{{.SYSROOT | default ""}}'
     cmds:
       - task: _hostlibs-windows
@@ -34,7 +34,7 @@ tasks:
     internal: true
     platforms: [windows]
     vars:
-      FLAVOR: '{{if eq .PGO "true"}}default{{else}}no-pgo{{end}}'
+      FLAVOR: '{{if eq .PGO "True"}}default{{else}}no-pgo{{end}}'
     cmds:
       - python -m pip install --disable-pip-version-check -r native/hostlibs/requirements.txt
       - conan export native/hostlibs