gitignore: add some generated amdgpu files

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
diff --git a/.gitignore b/.gitignore
index b876973..79b2ac1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -55,6 +55,7 @@
 libdrm_omap.pc
 libdrm_exynos.pc
 libdrm_freedreno.pc
+libdrm_amdgpu.pc
 libkms.pc
 libtool
 ltmain.sh
@@ -73,6 +74,7 @@
 tdfx.kld
 via.kld
 tests/auth
+tests/amdgpu/amdgpu_test
 tests/dristat
 tests/drmsl
 tests/drmstat