LU-16090 build: Module.symvers lookup by flavor on SUSE

LU-16090 build: Module.symvers lookup by flavor on SUSE

When multiple kernel flavors are found we need to select only
the Module.symvers for the flavor that is being built.

Lustre-change: https://review.whamcloud.com/48195
Lustre-commit: f3a9921ae4f9c3e48328f2c682e0c7e61221e0d3

HPE-bug-id: LUS-11149
Test-Parameters: trivial
Fixes: 1f4aaefe1aae ("LU-15962 build: add in-kernel Module.symvers to symbol path")
Signed-off-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Change-Id: I1c9af91108534d3a67f816077756fded4cd0b653
Reviewed-on: https://review.whamcloud.com/48328
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>