build: fix tarantool-sys build options

The commit c18fe6e6 is wrong. We've tried to disable building tests,
but:

1. A space in "CMAKE_TARANTOOL_ARGS" was parsed incorrectly.
2. `tarantool-sys/static-build/CMakeFiles.txt` did ignore
   `-DBUILD_TESTING` option.

build.rs

@@ -57,7 +57,7 @@ fn build_tarantool() {
     let dst = cmake::Config::new("tarantool-sys/static-build")
         .define(
             "CMAKE_TARANTOOL_ARGS",
-            "-DCMAKE_BUILD_TYPE=RelWithDebInfo -DBUILD_TESTING=FALSE",
+            "-DCMAKE_BUILD_TYPE=RelWithDebInfo;-DBUILD_TESTING=FALSE;-DBUILD_DOC=FALSE",
         )
         .build_target("tarantool")
         .out_dir(build_dir)

tarantool-sys @ 797bf67b

-Subproject commit 62bf16f8aee0e1c73c8b5052bed380df32fcfc3b
+Subproject commit 797bf67b8370b112200ec68410cd85b206aafe0d