Avoid the libcap buildsys forcing CC/CFLAGS/LDFLAGS/AR/RANLIB
Also install the shared lib +x

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>

diff -Nura libcap-2.22.orig/libcap/Makefile libcap-2.22/libcap/Makefile
--- libcap-2.22.orig/libcap/Makefile	2010-08-08 19:26:04.000000000 -0300
+++ libcap-2.22/libcap/Makefile	2011-12-14 11:33:51.761800334 -0300
@@ -65,7 +65,7 @@
 	install -m 0644 include/sys/capability.h $(INCDIR)/sys
 	mkdir -p -m 0755 $(LIBDIR)
 	install -m 0644 $(STALIBNAME) $(LIBDIR)/$(STALIBNAME)
-	install -m 0644 $(MINLIBNAME) $(LIBDIR)/$(MINLIBNAME)
+	install -m 0755 $(MINLIBNAME) $(LIBDIR)/$(MINLIBNAME)
 	ln -sf $(MINLIBNAME) $(LIBDIR)/$(MAJLIBNAME)
 	ln -sf $(MAJLIBNAME) $(LIBDIR)/$(LIBNAME)
 ifeq ($(FAKEROOT),)
diff -Nura libcap-2.22.orig/Make.Rules libcap-2.22/Make.Rules
--- libcap-2.22.orig/Make.Rules	2011-07-24 23:18:23.000000000 -0300
+++ libcap-2.22/Make.Rules	2011-12-14 11:33:28.707278685 -0300
@@ -47,25 +47,25 @@
 KERNEL_HEADERS := $(topdir)/libcap/include
 IPATH += -fPIC -I$(topdir)/libcap/include -I$(KERNEL_HEADERS)
 
-CC := gcc
-CFLAGS := -O2 -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
-BUILD_CC := $(CC)
-BUILD_CFLAGS := $(CFLAGS) $(IPATH)
-AR := ar
-RANLIB := ranlib
+CC ?= gcc
+CFLAGS ?= -O2 -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
+BUILD_CC ?= $(CC)
+BUILD_CFLAGS ?= $(CFLAGS) $(IPATH)
+AR ?= ar
+RANLIB ?= ranlib
 DEBUG = -g #-DDEBUG
 WARNINGS=-Wall -Wwrite-strings \
         -Wpointer-arith -Wcast-qual -Wcast-align \
         -Wstrict-prototypes -Wmissing-prototypes \
         -Wnested-externs -Winline -Wshadow
 LD=$(CC) -Wl,-x -shared
-LDFLAGS := #-g
+LDFLAGS ?= #-g
 
 SYSTEM_HEADERS = /usr/include
 INCS=$(topdir)/libcap/include/sys/capability.h
 LDFLAGS += -L$(topdir)/libcap
 CFLAGS += -Dlinux $(WARNINGS) $(DEBUG)
-PAM_CAP := $(shell if [ -f /usr/include/security/pam_modules.h ]; then echo yes ; else echo no ; fi)
+PAM_CAP = no
 INDENT := $(shell if [ -n "$(which indent 2>/dev/null)" ]; then echo "| indent -kr" ; fi)
 DYNAMIC := $(shell if [ ! -d "$(topdir)/.git" ]; then echo yes; fi)
 LIBATTR := yes