fixed few cloning and compilation errors

submodule clone error:

seraghiti@mint14 ~/dukluv $ git submodule update --init --recursive
Submodule 'lib/duktape' (https://github.com/svaarala/duktape-releases.git) registered for path 'lib/duktape'
Submodule 'lib/uv' (https://github.com/joyent/libuv.git) registered for path 'lib/uv'
Cloning into 'lib/duktape'...
remote: Counting objects: 1011, done.
remote: Compressing objects: 100% (306/306), done.
remote: Total 1011 (delta 698), reused 1011 (delta 698)
Receiving objects: 100% (1011/1011), 14.74 MiB | 256 KiB/s, done.
Resolving deltas: 100% (698/698), done.
Submodule path 'lib/duktape': checked out '0b56df7b1a4055054ed4860438ebbdaee5233c1b'
Cloning into 'lib/uv'...
remote: Counting objects: 20298, done.
remote: Total 20298 (delta 0), reused 0 (delta 0)
Receiving objects: 100% (20298/20298), 12.30 MiB | 507 KiB/s, done.
Resolving deltas: 100% (12410/12410), done.
fatal: reference is not a tree: 9572f3e74a167f59a8017e57ca3ebe91ffd88e18
Unable to checkout '9572f3e74a167f59a8017e57ca3ebe91ffd88e18' in submodule path 'lib/uv'


linker error:

Linking C static library libuv.a
[ 97%] Built target uv
Scanning dependencies of target dukluv
[100%] Building C object CMakeFiles/dukluv.dir/src/main.c.o
Linking C executable dukluv
libuv.a(dl.c.o): In function `uv_dlopen':
dl.c:(.text+0xbd): undefined reference to `dlerror'
dl.c:(.text+0xda): undefined reference to `dlopen'
libuv.a(dl.c.o): In function `uv_dlclose':
dl.c:(.text+0x13a): undefined reference to `dlclose'
libuv.a(dl.c.o): In function `uv_dlsym':
dl.c:(.text+0x150): undefined reference to `dlerror'
dl.c:(.text+0x164): undefined reference to `dlsym'
libuv.a(dl.c.o): In function `uv__dlerror':
dl.c:(.text+0x1b5): undefined reference to `dlerror'
libuv.a(linux-core.c.o): In function `uv__hrtime':
linux-core.c:(.text+0xa09): undefined reference to `clock_getres'
linux-core.c:(.text+0xa54): undefined reference to `clock_gettime'
libuv.a(linux-core.c.o): In function `uv_uptime':
linux-core.c:(.text+0xe4e): undefined reference to `clock_gettime'
linux-core.c:(.text+0xe66): undefined reference to `clock_gettime'
collect2: error: ld returned 1 exit status
make[2]: *** [dukluv] Error 1
make[1]: *** [CMakeFiles/dukluv.dir/all] Error 2
make: *** [all] Error 2