use build directory independend path in patch

(not tested yet)

angleproject/mingw-w64/PKGBUILD

@@ -19,7 +19,7 @@ source=('angleproject::git+https://chromium.googlesource.com/angle/angle#commit=
         'angleproject-include-import-library-and-use-def-file.patch')
 sha256sums=('SKIP'
             'SKIP'
-            '985a17541f2a4df6243cf817fd607f74619f995ff42f307ff95d6500f7f8fb64')
+            '22efbf1af26e017b4f0ee1a9429c532e0d75dc92b076fc2d0879d263f7d58a25')
 _architectures="i686-w64-mingw32 x86_64-w64-mingw32"
 
 #pkgver() {

angleproject/mingw-w64/angleproject-include-import-library-and-use-def-file.patch

@@ -5,7 +5,7 @@
                      'msvs_enable_winphone' : '1',
                  }],
 +                ['TARGET=="win32" or TARGET=="win64"', {
-+                    'ldflags': [ '-Wl,--out-implib,libEGL.dll.a ../src/libEGL/libEGL.def' ],
++                    'ldflags': [ '-Wl,--out-implib,libEGL.dll.a <(angle_path)/src/libEGL/libEGL.def' ],
 +                }],
              ],
 +            'libraries': [
@@ -21,7 +21,7 @@
                      'msvs_enable_winphone' : '1',
                  }],
 +                ['TARGET=="win32" or TARGET=="win64"', {
-+                    'ldflags': [ '-Wl,--out-implib,libGLESv2.dll.a ../src/libGLESv2/libGLESv2.def' ],
++                    'ldflags': [ '-Wl,--out-implib,libGLESv2.dll.a <(angle_path)/src/libGLESv2/libGLESv2.def' ],
 +                }],
              ],
 +            'libraries': [