Update boost to 1.79

Same as yocto is using.

Tested: Built dbus-sensors uring patches (which require 1.79) and they
built correctly.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Ic83a5ccb940fbc3bce4f8abedce1087e5cdfc102
diff --git a/scripts/build-unit-test-docker b/scripts/build-unit-test-docker
index d8fa7ee..be27ed9 100755
--- a/scripts/build-unit-test-docker
+++ b/scripts/build-unit-test-docker
@@ -77,7 +77,7 @@
 # Packages to include in image.
 packages = {
     "boost": PackageDef(
-        rev="1.78.0",
+        rev="1.79.0",
         url=(
             lambda pkg, rev: f"https://downloads.yoctoproject.org/mirror/sources/{pkg}_{rev.replace('.', '_')}.tar.bz2"
         ),