Doxygen: Update .gitignore for generating docs for in source build.

In source builds are not recommended, but we should still ignore
the generated artifacts.

diff --git a/.gitignore b/.gitignore
index 2804cfd9185abf0e706c29e2c648829d1b6823bc..f0b11aa92416b6b5c237a9a3057afb4677bf670f 100644 (file)
--- a/.gitignore
+++ b/.gitignore
@@ -37,6 +37,8 @@ build-aux/test-driver
 
 coverage
 
+/doc/html
+
 /src/liblzma/liblzma.pc
 /src/lzmainfo/lzmainfo
 /src/xz/xz