Added support for Sonic cross-compilation build. (#2233)

Signed-off-by: marvell <marvell@cpss-build3.marvell.com>

Co-authored-by: marvell <marvell@cpss-build3.marvell.com>

utilities_common/auto_techsupport_helper.py

@@ -72,8 +72,10 @@
 
 # Explicity Pass this to the subprocess invoking techsupport
 ENV_VAR = os.environ
-PATH_PREV = ENV_VAR["PATH"] if "PATH" in ENV_VAR else ""
-ENV_VAR["PATH"] = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:" + PATH_PREV
+if ('CROSS_BUILD_ENVIRON' not in ENV_VAR) or (ENV_VAR['CROSS_BUILD_ENVIRON'] != 'y'):
+	# Add native system directories to PATH variable only if it is not cross-compilation build 
+	PATH_PREV = ENV_VAR["PATH"] if "PATH" in ENV_VAR else ""
+	ENV_VAR["PATH"] = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:" + PATH_PREV
 
 # Techsupport Exit Codes
 EXT_LOCKFAIL = 2