python-smartpm: Add an attempt install mode

[ YOCTO #3723 ]

Add a mode to smart that will allow an installation to continue, instead of
failure in the case that one or more items is uninstallable.

Uninstallable packages are simply ignored, and no error is generated.

(From OE-Core rev: bdf07b1698d228dc7ff555199a269b1ff8ceca19)

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/python/python-smartpm_1.4.1.bb

@@ -30,6 +30,7 @@ SRC_URI = "\
           file://smart-flag-ignore-recommends.patch \
           file://smart-flag-exclude-packages.patch \
           file://smart-config-ignore-all-recommends.patch \
+          file://smart-attempt.patch \
           "
 
 SRC_URI[md5sum] = "573ef32ba177a6b3c4bf7ef04873fcb6"