ci: grab HIP_PATH

Author: IMbackK

.github/workflows/build.yml

@@ -1143,6 +1143,8 @@ jobs:
 
       - name: Install rocwmma
         run: |
+          $env:HIP_PATH=$(Resolve-Path 'C:\Program Files\AMD\ROCm\*\bin\clang.exe' | split-path | split-path)
+          $env:CMAKE_PREFIX_PATH="${env:HIP_PATH}"
           cd rocwmma
           cmake -G "Unix Makefiles" -B build -S . `
           -DROCWMMA_BUILD_TESTS=Off `