[PATCH] Loongarch: Fix plugin header missing install.

[Guo Jie]

gcc/ChangeLog:

        * config/loongarch/t-loongarch: Add loongarch-driver.h into
        TM_H. Add loongarch-def.h and loongarch-tune.h into
        OPTIONS_H_EXTRA.

Co-authored-by: Lulu Cheng <chengl...@loongson.cn>
---
 gcc/config/loongarch/t-loongarch | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gcc/config/loongarch/t-loongarch b/gcc/config/loongarch/t-loongarch
index 6d6e3435d59..e73f4f437ef 100644
--- a/gcc/config/loongarch/t-loongarch
+++ b/gcc/config/loongarch/t-loongarch
@@ -16,6 +16,10 @@
 # along with GCC; see the file COPYING3.  If not see
 # <http://www.gnu.org/licenses/>.
 
+TM_H += $(srcdir)/config/loongarch/loongarch-driver.h
+OPTIONS_H_EXTRA += $(srcdir)/config/loongarch/loongarch-def.h \
+                  $(srcdir)/config/loongarch/loongarch-tune.h
+
 # Canonical target triplet from config.gcc
 LA_MULTIARCH_TRIPLET = $(patsubst LA_MULTIARCH_TRIPLET=%,%,$\
 $(filter LA_MULTIARCH_TRIPLET=%,$(tm_defines)))
-- 
2.20.1