fix(build): wrap toolchain paths in double quotes

Fix issue with Windows paths containing spaces. Recent toolchain
refactoring (cc277de) caused a regression in the Windows build. Ensure
toolchain path utilities wrap paths in double quoted strings.

Change-Id: I7a136e459d85cff1e9851aedf0a5272a841df09c
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
Signed-off-by: Chris Kay <chris.kay@arm.com>
Co-authored-by: Chris Kay <chris.kay@arm.com>
5 files changed