Linking to lvm2app needs -ldl if it's built with --as-needed

---
--- liblvm/liblvm2app.pc.in
+++ liblvm/liblvm2app.pc.in
@@ -8,4 +8,4 @@
 Version: @LVM_MAJOR@.@LVM_LIBAPI@
 Cflags: -I${includedir} 
 Libs: -L${libdir} -llvm2app
-Libs.private: -ldevmapper
+Libs.private: -ldevmapper -ldl
--- liblvm/Makefile.in	2009-10-02 21:10:36.000000000 +0200
+++ liblvm/Makefile.in	2010-04-04 15:09:55.000000000 +0200
@@ -41,7 +41,7 @@
 
 include ../make.tmpl
 
-LIBS += -ldevmapper -llvm-internal
+LIBS += -ldevmapper -llvm-internal -ldl
 
 ifeq ("@DMEVENTD@", "yes")
   LIBS += -ldevmapper-event