devtool.py: Fix parsing of bitbake-layers' output

Current parsing was picking wrong targets, leading to the following problem:

	AssertionError: Command 'bitbake  Parsing recipes..done. -e' returned non-zero exit status 1:

(From OE-Core rev: eaf83a58825d91c7445835b27d843da7532c208b)

Signed-off-by: Leonardo Sandoval <leonardo.sandoval.gonzalez@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/selftest/devtool.py

@@ -467,12 +467,11 @@ class DevtoolTests(DevtoolBase):
         testrecipes = 'perf kernel-devsrc package-index core-image-minimal meta-toolchain packagegroup-core-sdk meta-ide-support'.split()
         # Find actual name of gcc-source since it now includes the version - crude, but good enough for this purpose
         result = runCmd('bitbake-layers show-recipes gcc-source*')
-        reading = False
         for line in result.output.splitlines():
-            if line.startswith('=='):
-                reading = True
-            elif reading and not line.startswith(' '):
-                testrecipes.append(line.split(':')[0])
+            # just match those lines that contain a real target
+            m = re.match('(?P<recipe>^[a-zA-Z0-9.-]+)(?P<colon>:$)', line)
+            if m:
+                testrecipes.append(m.group('recipe'))
         for testrecipe in testrecipes:
             # Check it's a valid recipe
             bitbake('%s -e' % testrecipe)