Add -lole32 to link libraries.
This fixes a problem when compiling with mingw-headers version 3.3
where the use of SHGetFolderPath() expands to a call to CoTaskMemFree()
which is defined in libole32.dll:
/usr/x86_64-w64-mingw32/sys-root/mingw/include/shobjidl.h:29954: undefined reference to `__imp_CoTaskMemFree'
2 exec_prefix=@exec_prefix@
4 includedir=@includedir@
7 Description: library for depsolving, installing and removing packages
9 Requires.private: @REQUIREMENTS@
10 Libs: -L${libdir} -lrazor
11 Libs.private: @EXPAT_LIBS@ @ZLIB_LIBS@ @INTLLIBS@ @EXTRA_LIBS@
12 Cflags: -I${includedir}/razor