[angle] don't link to frameworks with absolute path

[daschuer]

Is your feature request related to a problem? Please describe.

angle suffers from #16259

see unofficial-angle-targets.cmake

set_target_properties(unofficial::angle::libGLESv2 PROPERTIES
  INTERFACE_LINK_LIBRARIES "\$<LINK_ONLY:unofficial::angle::libANGLE>;/Applications/Xcode_12.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.1.sdk/System/Library/Frameworks/CoreGraphics.framework;/Applications/Xcode_12.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.1.sdk/System/Library/Frameworks/Foundation.framework;/Applications/Xcode_12.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.1.sdk/System/Library/Frameworks/IOKit.framework;/Applications/Xcode_12.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.1.sdk/System/Library/Frameworks/IOSurface.framework;/Applications/Xcode_12.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.1.sdk/System/Library/Frameworks/Quartz.framework"
)

Proposed solution

The best would be an upstream patch, but I don't know how to do it. Since it is an "unofficial" cmake config file, the issue will be hard to discuss with upstream.

Describe alternatives you've considered

The alternative would be patching the unofficial-angle-targets.cmake after creation.

Additional context

No response

[JackBoosY]

I think we have a same issue.