Add support for log-handler

This handler is based off of version handler with major differences in
handler_builder

Tested:
created the blackbox blob successfully using this lib.
Read the data from the blob using a host side tool

Signed-off-by: Gaurav Gandhi <gauravgandhi@google.com>
Change-Id: I9ef775af752156a1647453ff3831ef4c0449d546
diff --git a/bmc/meson.build b/bmc/meson.build
index 0ccd3c2..a65d888 100644
--- a/bmc/meson.build
+++ b/bmc/meson.build
@@ -22,4 +22,5 @@
 endif
 
 subdir('firmware-handler')
-subdir('version-handler')
\ No newline at end of file
+subdir('version-handler')
+subdir('log-handler')
\ No newline at end of file