Add eclipse-specific project files to gitignore

The project file must be at root directory:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=78438
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>

.gitignore

@@ -23,6 +23,11 @@ coverage-summary.txt
 # generated by scripts/memory.sh
 massif-*
 
+# Eclipse project files
+.cproject
+.project
+/.settings
+
 # MSVC build artifacts:
 *.exe
 *.pdb