tests/system/kernel/vm/Jamfile: remove non-existent

This non-existent file causes unittests builds to fail.

Change-Id: I0ea2164487279fefcbc9e5c930440db3f2e6ccb9
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2969
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

tests: Fix build on x86_gcc2

This patch fixes the build of unittests on x86_gcc2.

src/tests/kits/shared/KeymapTest.cpp:
* Don't use auto
* Don't use braced-initialization for std::map.

src/tests/system/kernel/vm/Jamfile:
* Link lock.o from kernel source to include _mutex_lock and
_mutex_unlock when linking libkernelvmtest.so

Change-Id: I60e02bfb23334064ec25d767f659a188e393ed1c
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2074
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

kernel: vm: add unit tests for get_mount_point

Change-Id: I1eb7540ffadb26acf05b695af2e7508c71ac7274
Reviewed-on: https://review.haiku-os.org/460
Reviewed-by: waddlesplash <waddlesplash@gmail.com>