mimo-updater: use unversioned libchrome libraray.

Libchrome is changing pkg-config and .so library name from
xxxx-${libbase_ver}.{pc,so} to xxx.{pc,so}.

Libchrome uprev rebuild will be handled by ebuild subslot change. And
there's no need to install multiple libchrome. Keeping libbase_ver
suffix will cause troubles on linking libraries when developers wants to
test locally emerge a-single-package without build_packages, after a
libchrome uprev. Especially in a case a package depends on another
package(library), and both depends on libchrome. Thus, removing
libbase_ver from suffix.

BUG=chromium:920513
TEST=CQ

Change-Id: I8952f2e9df31a55ede9e5919ad372ed12b503e8f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/mimo-updater/+/2505329
Reviewed-by: Joe Tessler <jrt@chromium.org>
Commit-Queue: Qijiang Fan <fqj@google.com>
Tested-by: Qijiang Fan <fqj@google.com>
diff --git a/Makefile b/Makefile
index eb6b0c7..9bff7e3 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@
 
 TARGET_NAME := mimo-updater
 
-PC_DEPS = libbrillo libchrome-$(BASE_VER) libusb-1.0
+PC_DEPS = libbrillo libchrome libusb-1.0
 PC_LIBS := $(shell $(PKG_CONFIG) --libs $(PC_DEPS))
 PC_CFLAGS := $(shell $(PKG_CONFIG) --cflags $(PC_DEPS))