[PATCH openbmc] Fix i2c-tools SRCURI syntax

[OpenBMC Patches]

From: Rick Altherr <raltherr at google.com>

Override syntax (FOO_append, FOO_prepend) doesn't insert spaces to
separate the append from the original value.  This caused the two URIs
to be incorrectly merged into one and caused a download failure.  It
happens that the fallback in that case is to use the Yocto mirror so it
kept working other than emitting a warning.  Using =+ prepend syntax
correctly adds the separating space.

Change-Id: I36f48cb53aa29ea9a4bde738c975784f6ce24250
Signed-off-by: Rick Altherr <raltherr at google.com>
---
 meta-phosphor/common/recipes-devtools/i2c-tools/i2c-tools_%.bbappend | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/meta-phosphor/common/recipes-devtools/i2c-tools/i2c-tools_%.bbappend b/meta-phosphor/common/recipes-devtools/i2c-tools/i2c-tools_%.bbappend
index bdbdc67..599394d 100644
--- a/meta-phosphor/common/recipes-devtools/i2c-tools/i2c-tools_%.bbappend
+++ b/meta-phosphor/common/recipes-devtools/i2c-tools/i2c-tools_%.bbappend
@@ -1,4 +1,5 @@
+# Prefer the Yocto mirror over the direct lm-sensors download.
 SRC_URI_remove = "http://dl.lm-sensors.org/i2c-tools/releases/${BP}.tar.bz2"
-SRC_URI_prepend = "http://downloads.yoctoproject.org/mirror/sources/${BP}.tar.bz2"
+SRC_URI =+ "http://downloads.yoctoproject.org/mirror/sources/${BP}.tar.bz2"
 
 RDEPENDS_${PN}_remove = "${PN}-misc"
-- 
2.8.3