build: make scan-build work again

This drops the scan-build related Kconfig options
since it's now possible to simply run

    scan-build [-o outdir] make

and get coreboot built with its report.

There's also no inner make process anymore, and the way
things work should be clearer now.

Also adapt abuild to this new reality.

Change-Id: I03e03334761ec83f718b3235ebf811834cd2e3e3
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/5774
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/Kconfig

@@ -80,29 +80,6 @@ config ANY_TOOLCHAIN
 	  we'll have to assume that they use their distro compiler by mistake.
 	  Make sure that using patched compilers is a conscious decision.
 
-config SCANBUILD_ENABLE
-	bool "Build with scan-build for static code analysis"
-	default n
-	help
-	  Changes the build process to use scan-build (a utility for
-	  running the clang static code analyzer from the command line).
-
-	  Requires the scan-build utility in your system $PATH.
-
-	  For details see http://clang-analyzer.llvm.org/scan-build.html.
-
-config SCANBUILD_REPORT_LOCATION
-	string "Directory for the scan-build report(s)"
-	default ""
-	depends on SCANBUILD_ENABLE
-	help
-	  Directory where the scan-build reports should be stored in. The
-	  reports are stored in subdirectories of the form 'yyyy-mm-dd-*'
-	  in the specified directory.
-
-	  If this setting is left empty, the coreboot top-level directory
-	  will be used to store the report subdirectories.
-
 config CCACHE
 	bool "Use ccache to speed up (re)compilation"
 	default n