bcc: link LLVM dynamically.

As a distro, we want this anyway, but static linking also broke, e.g.
bpftrace: bpftrace/bpftrace#1855

void-linux/void-packages@85c4ba0

srcpkgs/bcc/template

@@ -1,7 +1,7 @@
 maintainer="nox"
 pkgname="bcc"
 version=0.21.0
-revision=3
+revision=4
 short_desc="BPF-based Linux IO analysis, networking, monitoring, and more"
 makedepends+=" clang"
 makedepends+=" clang-tools-extra"
@@ -27,7 +27,8 @@ checksum+=" 5323e2a505f6868976d973a234202332ec25dc36f0bf7c118c23fc24f6147215"
 checksum+=" e1db8edc20997270a7d7c4d6e5d881abb941828601f113866ebb4073168c1f87"
 wrksrc="$pkgname"
 build_style="cmake"
-configure_args="-DREVISION=$version"
+configure_args+=" -DENABLE_LLVM_SHARED=1"
+configure_args+=" -DREVISION=$version"
 python_version=3
 
 post_extract() {