Don't duplicate CFLAGS and CPPFLAGS.

Don't put the CPPFLAGS and CFLAGS duplicate to the compiler which lead
to warnings about redefinition of constants on command line like

    <command-line>:0:0: warning: "EXTENSIONDIR" redefined
    <command-line>:0:0: note: this is the location of the previous
    definition

1 files changed, 6 insertions, 5 deletions

diff --git a/Makefile b/Makefile
index dd9aa53..2b84a6a 100644
--- a/Makefile
+++ b/Makefile
@@ -4,11 +4,12 @@ all: $(SRCDIR).subdir-all
 
 options:
 	@echo "vimb build options:"
-	@echo "LIBS      = $(LIBS)"
-	@echo "CFLAGS    = $(CFLAGS)"
-	@echo "LDFLAGS   = $(LDFLAGS)"
-	@echo "EXTCFLAGS = $(EXTCFLAGS)"
-	@echo "CC        = $(CC)"
+	@echo "LIBS        = $(LIBS)"
+	@echo "CFLAGS      = $(VIMB_CFLAGS)"
+	@echo "LDFLAGS     = $(VIIMB_LDFLAGS)"
+	@echo "EXT_CFLAGS  = $(EXT_CFLAGS)"
+	@echo "EXT_LDFLAGS = $(EXT_LDFLAGS)"
+	@echo "CC          = $(CC)"
 
 install: $(SRCDIR).subdir-all
 	@# binary