Renaming 'install' build phase to 'libs'

Bug #56601 r=pavlov

content/xslt/src/base/Makefile.in

@@ -56,4 +56,4 @@ include $(topsrcdir)/config/rules.mk
 
 INCLUDES += -I$(srcdir)/../xpath -I$(srcdir)/../xslt
 
-install:: $(OBJS)
+libs:: $(OBJS)

content/xslt/src/xml/Makefile.in

@@ -48,4 +48,4 @@ include $(topsrcdir)/config/rules.mk
 
 INCLUDES += -I$(srcdir)/../base -I$(srcdir)/dom
 
-install:: $(OBJS)
+libs:: $(OBJS)

content/xslt/src/xpath/Makefile.in

@@ -87,4 +87,4 @@ ifndef TX_EXE
 INCLUDES += -I$(srcdir)
 endif
 
-install:: $(OBJS)
+libs:: $(OBJS)

content/xslt/src/xslt/Makefile.in

@@ -56,4 +56,4 @@ INCLUDES += -I$(srcdir) -I$(srcdir)/../base -I$(srcdir)/../net \
   -I$(srcdir)/../xml/printer -I$(srcdir)/../xpath -I$(srcdir)/../xslt/util \
   -I$(srcdir)/../xslt/functions
 
-install:: $(OBJS)
+libs:: $(OBJS)