Enforce a "lib" prefix for UNO components for Android

This commit for the old build system. (Don't bother for components not
relevant for Android.)

The Android package installer (as invoked through "adb install", from
"ant debug install") silently ignores native libraries in app packages
(.apk files) whose names don't start with "lib" and end with ".so".

The package builder (as invoked through "ant debug") in the SDK gladly
includes also thusly named native libraries in the .apk, though. Yay
for consistency.

cppcanvas/source/uno/makefile.mk

@@ -44,7 +44,7 @@ CDEFS+= -DVERBOSE
 
 SLOFILES =	$(SLO)$/uno_mtfrenderer.obj
 
-SHL1TARGET=$(TARGET).uno
+SHL1TARGET=$(ENFORCEDSHLPREFIX)$(TARGET).uno
 
 SHL1STDLIBS= $(SALLIB) $(CPPULIB) $(CPPUHELPERLIB) $(COMPHELPERLIB) $(CPPCANVASLIB) $(BASEGFXLIB)