feat: extract standalone Event Log library

Extract the Event Log driver from TF-A into its own `libevlog` project.
Add a CMake-based build to support initialization, measurement,
recording, and dumping of TCG event logs across projects

Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
Change-Id: I44dce25b3d67db94e5e0774174967433c2a5a377
diff --git a/.gitignore b/.gitignore
index 3c5d464..c5c5786 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,16 +1,91 @@
-# Ignore miscellaneous files
-cscope.*
-*.swp
-*.patch
-*~
-.project
-.cproject
+### C ###
+# Prerequisites
+*.d
+build/
+unity
 
-# Ctags
-tags
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
 
-# common python virtual environment directories
-.env/
-env/
-.venv/
-venv/
+# Linker output
+*.ilk
+*.map
+*.exp
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
+*.su
+*.idb
+*.pdb
+
+# Kernel Module Compile Results
+*.mod*
+*.cmd
+.tmp_versions/
+modules.order
+Module.symvers
+Mkfile.old
+dkms.conf
+
+### C++ ###
+# Prerequisites
+
+# Compiled Object files
+*.slo
+
+# Precompiled Headers
+
+# Compiled Dynamic libraries
+
+# Fortran module files
+*.mod
+*.smod
+
+# Compiled Static libraries
+*.lai
+
+# Executables
+
+### CMake ###
+CMakeLists.txt.user
+CMakeCache.txt
+CMakeFiles
+CMakeScripts
+Testing
+Makefile
+cmake_install.cmake
+install_manifest.txt
+compile_commands.json
+CTestTestfile.cmake
+_deps
+
+### CMake Patch ###
+# External projects
+*-prefix/