Ignore *.o everywhere

We don't commit *.o files anywhere, not even as test data. So ignore them
everywhere.

Also remove a redundant ignore of *.exe in a subdirectory.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>

.gitignore

@@ -28,6 +28,9 @@ massif-*
 .project
 /.settings
 
+# Unix-like build artifacts:
+*.o
+
 # MSVC build artifacts:
 *.exe
 *.pdb

3rdparty/everest/.gitignore

@@ -1,2 +1 @@
-*.o
 Makefile

library/.gitignore

@@ -1,4 +1,3 @@
-*.o
 libmbed*
 *.sln
 *.vcxproj

programs/.gitignore

@@ -5,9 +5,6 @@
 *.sln
 *.vcxproj
 
-*.o
-*.exe
-
 aes/crypt_and_hash
 hash/generic_sum
 hash/hello

tests/.gitignore

@@ -10,9 +10,6 @@ data_files/entropy_seed
 
 include/test/instrument_record_status.h
 
-src/*.o
-src/test_helpers/*.o
-src/drivers/*.o
 src/libmbed*
 
 libtestdriver1/*