This resolves the problem where some users had to configure using
--with-system-zlib.

	* build-all.sh: Do not explicitly use --enable-multilib when
	configuring, since it is the default and being explicit triggers
	PR45174.
	* build-kernel.sh: No need to delete C++ libraries.
	* check-results.sh: Better alignment for 6 digit totals.

Conflicts (resolved):
	check-results.sh
Use /bin/sh for all scripts and make dash compatible.

	* arc-versions.sh: Explicitly choose /bin/sh.
	* build-all.sh: Change == to = in tests throughout.
	* build-elf32.sh: Change == to = in tests throughout.
	* check-results.sh: Change == to = in tests throughout, use
	/bin/sh, not /bin/bash.
	* diff-all.sh: Use /bin/sh, not /bin/bash.
	* diff-tests.sh: Likewise
	* get-ip.sh: Change == to = in tests throughout, use
	/bin/sh, not /bin/bash.
Merge branch 'arc-toolchain-mainline' of github.com:foss-for-synopsys-dwc-arc-processors/toolchain into arc-toolchain-mainline

Conflicts (resolved):
	ChangeLog