Reorganize the dump thermal script source and sepolicy to its own
folder. This is done as a part of moving all thermal product
makefiles to gs-common.
Bug: 289146743
Test: Compilation and bootup test
Change-Id: Ie9162b401c9bed57c3d2e2648edc17457ad8883e
Signed-off-by: Ram Chandrasekar <rchandrasekar@google.com>