ulibc: Change the link order + add -ldl

ulibc linking is a bit more particular than regular glibc

src/client/ply-boot-client.pc.in

@@ -6,5 +6,5 @@ includedir=@includedir@
 Name: Plymouth
 Description: Client Library for Boot Splash
 Version: @VERSION@
-Libs: -L${libdir} -lply -lply-boot-client
+Libs: -L${libdir} -lply-boot-client -lply -ldl
 Cflags: -I${includedir}/plymouth-1/ply -I${includedir}/plymouth-1/ply-boot-client

src/ply-splash-core.pc.in

@@ -10,5 +10,5 @@ policydir=@PLYMOUTH_POLICY_DIR@
 Name: Plymouth
 Description: Utility Library for Boot Splash Plugins
 Version: @VERSION@
-Libs: -L${libdir} -lply -lply-splash-core
+Libs: -L${libdir} -lply-splash-core -lply -ldl
 Cflags: -I${includedir}/plymouth-1/ply -I${includedir}/plymouth-1/ply-splash-core