tools/pkg-config: Handle variable substitution of 'bindir' to redirect to STAGING_DIR/bin

Signed-off-by: Ted Hess <[email protected]>

tools/pkg-config/files/pkg-config

@@ -1,3 +1,3 @@
 #!/bin/sh
 
-pkg-config.real --define-variable=prefix=${STAGING_PREFIX} --define-variable=exec_prefix=${STAGING_PREFIX} $@
+pkg-config.real --define-variable=prefix=${STAGING_PREFIX} --define-variable=exec_prefix=${STAGING_PREFIX} --define-variable=bindir=${STAGING_PREFIX}/bin $@