Unbreak on FreeBSD 9.X and -CURRENT after r215840: #include <stdlib.h> inside

`#pragma GCC visibility push(hidden)' results in free() symbol being .hidden,
and linker woes.  As a remedy, temporarily revert visibility to default when
including this header (probably not the best way to solve the problem though).

While here, pacify portlint(1) by removing hard-coded shlib ABI versions in
LIB_DEPENDS.

Reported by:	pointyhat (via pav, erwin)

audio/osd-lyrics/Makefile

@@ -17,11 +17,9 @@ COMMENT=	On-screen lyrics display program for various media players
 
 LICENSE=	GPLv3
 
-LIB_DEPENDS=	notify.4:${PORTSDIR}/devel/libnotify \
-		dbus-glib-1.2:${PORTSDIR}/devel/dbus-glib \
-		curl.6:${PORTSDIR}/ftp/curl
-
-BROKEN=		does not compile
+LIB_DEPENDS=	notify:${PORTSDIR}/devel/libnotify \
+		dbus-glib-1:${PORTSDIR}/devel/dbus-glib \
+		curl:${PORTSDIR}/ftp/curl
 
 GNU_CONFIGURE=	yes
 CONFIGURE_ENV=	DATADIRNAME=share
@@ -42,13 +40,13 @@ OPTIONS=	MPD	"Enable MPD support"		off \
 .include <bsd.port.options.mk>
 
 .if defined(WITH_MPD)
-LIB_DEPENDS+=	mpd.4:${PORTSDIR}/audio/libmpd
+LIB_DEPENDS+=	mpd:${PORTSDIR}/audio/libmpd
 .else
 CONFIGURE_ARGS+=	--disable-mpd
 .endif
 
 .if defined(WITH_XMMS2)
-LIB_DEPENDS+=	xmmsclient.6:${PORTSDIR}/audio/xmms2
+LIB_DEPENDS+=	xmmsclient:${PORTSDIR}/audio/xmms2
 .else
 CONFIGURE_ARGS+=	--disable-xmms2
 .endif

audio/osd-lyrics/files/patch-free-visibility

@@ -0,0 +1,24 @@
+--- lib/chardetect/src/entry/impl.cpp.orig
++++ lib/chardetect/src/entry/impl.cpp
+@@ -42,7 +42,9 @@
+ #include "nscore.h"
+ #include "nsUniversalDetector.h"
+ #include <string.h>
++#pragma GCC visibility push(default)
+ #include <stdlib.h>
++#pragma GCC visibility pop
+ 
+ #ifdef _WIN32
+ #   include <windows.h>
+--- lib/chardetect/src/prmem.h.orig
++++ lib/chardetect/src/prmem.h
+@@ -37,7 +37,9 @@
+ #ifndef nsDummyPrmem_h__
+ #define nsDummyPrmem_h__
+ 
++#pragma GCC visibility push(default)
+ #include <stdlib.h>
++#pragma GCC visibility pop
+ 
+ inline void* PR_Malloc(size_t len)
+ {