mmc-utils: update to latest git revision

This also includes a fix for the trimming function and thus fixes #7306.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

utils/mmc-utils/Makefile

@@ -12,9 +12,9 @@ PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc-utils.git
-PKG_SOURCE_DATE:=2018-03-27
-PKG_SOURCE_VERSION:=b4fe0c8c0e57a74c01755fa9362703b60d7ee49d
-PKG_MIRROR_HASH:=ce7018d6ba6f2cccc64a40103cfb64f8905c96262140cdc8bf5f7674f192b81b
+PKG_SOURCE_DATE:=2018-12-09
+PKG_SOURCE_VERSION:=485b05ec40031a06077db9c84ae75a36ebd3db25
+PKG_MIRROR_HASH:=043d706a5bb7c206ccfdc1a5e604bf03bd744f8dcfaeccba1a7ef845a18fbd26
 
 PKG_LICENSE:=GPL-2.0
 PKG_LICENSE_FILES:=