libsndfile: update to 2019-04-07-d5531723

Signed-off-by: Peter Wagner <tripolar@gmx.at>

libs/libsndfile/Makefile

@@ -12,9 +12,9 @@ PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://github.com/erikd/libsndfile.git
-PKG_SOURCE_DATE:=2019-03-08
-PKG_SOURCE_VERSION:=5056a77fdae85f96eee4dff82af462db5a5c341e
-PKG_MIRROR_HASH:=5a695b64885ed3c41910029116de8b713118be6349554685fe53997316c369ea
+PKG_SOURCE_DATE:=2019-04-07
+PKG_SOURCE_VERSION:=d5531723a07ffbf7717c141b792dba8e1fbcb1c5
+PKG_MIRROR_HASH:=927c6e0bac2be46d314f77afa1f205fe176b31ec30da6bb00c8793cd69007060
 
 PKG_LICENSE:=LGPLv2.1
 PKG_LICENSE_FILES:=COPYING