build: add install step to doc CI build

We had some fallouts which were happened at the install step when the
documentation was build. Let's add this step, so we catch those errors
in future.

Signed-off-by: Daniel Wagner <dwagner@suse.de>

Author: igaw

scripts/build.sh

@@ -123,6 +123,7 @@ config_meson_docs() {
         -Ddocs=all                              \
         -Ddocs-build=true                       \
         --force-fallback-for=libnvme            \
+        --prefix=/tmp/usr                       \
         -Dlibnvme:werror=false                  \
         "${BUILDDIR}"
 }
@@ -154,7 +155,12 @@ test_meson_coverage() {
 }
 
 install_meson_appimage() {
-    "${MESON}" install                             \
+    "${MESON}" install                          \
+        -C "${BUILDDIR}"
+}
+
+install_meson_docs() {
+    "${MESON}" install                          \
         -C "${BUILDDIR}"
 }