insane: tidy up objdump preloading in package_qa_walk()

Move the prepopulate function out of global scope, and access the
dictionary once instead of repeatedly.

This still results in each ELF being opened twice, but this avoids
opening all of the files at once and the ELFFile.open() call is fairly
fast.

(From OE-Core rev: cda3647b32703f43c4fe2af3bab977e5698633f6)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes-global/insane.bbclass

@@ -763,10 +763,6 @@ def qa_check_staged(path,d):
             if not skip_shebang_size:
                 package_qa_check_shebang_size(path, "", d, None)
 
-def prepopulate_objdump_p(elf, d):
-    output = elf.run_objdump("-p", d)
-    return (elf.name, output)
-
 # Walk over all files in a directory and call func
 def package_qa_walk(checkfuncs, package, d):
     elves = {}
@@ -782,17 +778,22 @@ def package_qa_walk(checkfuncs, package, d):
             if elf:
                 elves[path] = elf
 
+    def prepopulate_objdump_p(elf, d):
+        output = elf.run_objdump("-p", d)
+        return (elf.name, output)
+
     results = oe.utils.multiprocess_launch(prepopulate_objdump_p, elves.values(), d, extraargs=(d,))
     for item in results:
         elves[item[0]].set_objdump("-p", item[1])
 
     for path in pkgfiles[package]:
-            if path in elves:
-                elves[path].open()
-            for func in checkfuncs:
-                func(path, package, d, elves.get(path))
-            if path in elves:
-                elves[path].close()
+        elf = elves.get(path)
+        if elf:
+            elf.open()
+        for func in checkfuncs:
+            func(path, package, d, elf)
+        if elf:
+            elf.close()
 
 def package_qa_check_rdepends(pkg, pkgdest, skip, taskdeps, packages, d):
     # Don't do this check for kernel/module recipes, there aren't too many debug/development