This patch cleans up libcurl.pc to remove redundant compiler/linker
flags that refer to standard directories, i.e.

-L/usr/lib(64)?
-I/usr/include

--- libcurl.pc.in
+++ libcurl.pc.in
@@ -36,7 +36,7 @@ Description: Library to transfer files w
 Version: @CURLVERSION@
 Requires: @LIBCURL_PC_REQUIRES@
 Requires.private: @LIBCURL_PC_REQUIRES_PRIVATE@
-Libs: -L${libdir} -lcurl @LIBCURL_PC_LIBS@
+Libs: -lcurl @LIBCURL_PC_LIBS@
 Libs.private: @LIBCURL_PC_LDFLAGS_PRIVATE@ @LIBCURL_PC_LIBS_PRIVATE@
-Cflags: -I${includedir} @LIBCURL_PC_CFLAGS@
+Cflags: @LIBCURL_PC_CFLAGS@
 Cflags.private: @LIBCURL_PC_CFLAGS_PRIVATE@