[tracker-miners] meson: Allow to build with non-GNU libc

[Sam Thursfield <sthursfield src gnome org>]

commit 600c8ae748a3ccbdf20540afa35594c60ca2dfb0
Author: Quentin Glidic <sardemff7+git sardemff7 net>
Date:   Sun Dec 10 11:17:41 2017 +0100

    meson: Allow to build with non-GNU libc
    
    https://bugzilla.gnome.org/show_bug.cgi?id=791432
    
    Signed-off-by: Quentin Glidic <sardemff7+git sardemff7 net>

 meson.build |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/meson.build b/meson.build
index c8c8717..0983894 100644
--- a/meson.build
+++ b/meson.build
@@ -63,7 +63,7 @@ zlib = dependency('zlib')
 
 libgif = cc.find_library('libgif', required: false)
 libjpeg = cc.find_library('libjpeg', required: false)
-libmath = cc.find_library('m')
+libmath = cc.find_library('m', required: false)
 
 # FIXME: here we work around a quirk todo with Meson and Vala: the 'uuid'
 # pkg-config component corresponds to 'libuuid.vapi', but Meson assumes that