Too many "no symbols" log messages during build

[Jaikiran Pai]

I just updated my local jdk repo to latest upstream and triggered a
"make images" after a "make clean". All went fine, except, I saw these
"no symbols" log messages while the build was in progress:

...

Compiling 1003 files for jdk.hotspot.agent
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
no symbols
Creating support/modules_libs/java.base/libverify.dylib from 1 file(s)

....

I don't remember seeing those messages before, whenever I have built the
jdk repo. In the current form, those messages don't appear to be useful
either. Are those logs intentional?

-Jaikiran