Prepare for 0.176

Set version to 0.176.
Update NEWS and elfutils.spec.in.
Update GPG-KEY.
Regenerate po/*.po files.

Signed-off-by: Mark Wielaard <mark@klomp.org>
diff --git a/NEWS b/NEWS
index 95fbac0..5a06047 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,13 @@
+Version 0.176
+
+build: Add new --enable-install-elfh option.
+       Do NOT use this for system installs (it overrides glibc elf.h).
+
+backends: riscv improved core file and return value location support.
+
+Fixes CVE-2019-7146, CVE-2019-7148, CVE-2019-7149, CVE-2019-7150,
+      CVE-2019-7664, CVE-2019-7665
+
 Version 0.175
 
 readelf: Handle mutliple .debug_macro sections.