Fix mac build (ldflags -> ldlibs)

Test: mmma system/core/fastboot   (on mac)
Change-Id: Ib917758c59fc33d6f8d9bd4f8716cf530c646f54
diff --git a/fastboot/Android.mk b/fastboot/Android.mk
index 5321b4f..9bd0628 100644
--- a/fastboot/Android.mk
+++ b/fastboot/Android.mk
@@ -66,7 +66,7 @@
 LOCAL_CFLAGS_darwin := $(fastboot_cflags_darwin)
 LOCAL_CXX_STL := $(fastboot_stl)
 LOCAL_HEADER_LIBRARIES := bootimg_headers
-LOCAL_LDLIBS_darwin := $(fastboot_ldflags_darwin)
+LOCAL_LDLIBS_darwin := $(fastboot_ldlibs_darwin)
 LOCAL_LDLIBS_windows := $(fastboot_ldlibs_windows)
 LOCAL_SHARED_LIBRARIES := $(fastboot_shared_libs)
 LOCAL_STATIC_LIBRARIES := $(fastboot_static_libs)
@@ -84,7 +84,7 @@
 LOCAL_CFLAGS_darwin := $(fastboot_cflags_darwin)
 LOCAL_CXX_STL := $(fastboot_stl)
 LOCAL_HEADER_LIBRARIES := bootimg_headers
-LOCAL_LDLIBS_darwin := $(fastboot_ldflags_darwin)
+LOCAL_LDLIBS_darwin := $(fastboot_ldlibs_darwin)
 LOCAL_LDLIBS_windows := $(fastboot_ldlibs_windows)
 LOCAL_REQUIRED_MODULES := mke2fs make_f2fs
 LOCAL_REQUIRED_MODULES_darwin := e2fsdroid mke2fs.conf sload_f2fs
@@ -132,7 +132,7 @@
 LOCAL_CFLAGS_darwin := $(fastboot_cflags_darwin)
 LOCAL_CXX_STL := $(fastboot_stl)
 LOCAL_HEADER_LIBRARIES := bootimg_headers
-LOCAL_LDLIBS_darwin := $(fastboot_ldflags_darwin)
+LOCAL_LDLIBS_darwin := $(fastboot_ldlibs_darwin)
 LOCAL_LDLIBS_windows := $(fastboot_ldlibs_windows)
 LOCAL_SHARED_LIBRARIES := $(fastboot_shared_libs)
 LOCAL_SHARED_LIBRARIES_windows := AdbWinApi