debuggerd: Fix missing include.

The structure user_vfp is incorrectly defined in bionic/libc/kernel/arch-arm/asm/ptrace.h
at the moment, while it should be under bionic/libc/kernel/arch-arm/asm/user.h instead.

Before moving its definition in the corresponding source files, we need to fix its users.
It happens that debuggerd is the only one for now, so fix this by including <linux/user.h>
instead (which will include <asm/user.h> and <asm/ptrace.h>).

Also, make the debug output less chatty by specifying all symbols to be listed
through XLOG2 instead of XLOG.

Change-Id: I16e0fa700945d86efd44ee885a84ad609c0a9b58
diff --git a/debuggerd/symbol_table.c b/debuggerd/symbol_table.c
index fd008fe..23572a3 100644
--- a/debuggerd/symbol_table.c
+++ b/debuggerd/symbol_table.c
@@ -50,7 +50,7 @@
     int length;
     char *base;
 
-    XLOG("Creating symbol table for %s\n", filename);
+    XLOG2("Creating symbol table for %s\n", filename);
     int fd = open(filename, O_RDONLY);
 
     if(fd < 0) {
@@ -126,7 +126,7 @@
                 dynsymbol_count++;
             }
         }
-        XLOG("Dynamic Symbol count: %d\n", dynsymbol_count);
+        XLOG2("Dynamic Symbol count: %d\n", dynsymbol_count);
     }
 
     if (sym_idx != -1) {
@@ -139,7 +139,7 @@
                 symbol_count++;
             }
         }
-        XLOG("Symbol count: %d\n", symbol_count);
+        XLOG2("Symbol count: %d\n", symbol_count);
     }
 
     // Now, create an entry in our symbol table structure for each symbol...
@@ -160,7 +160,7 @@
                 table->symbols[j].name = strdup(dynstr + dynsyms[i].st_name);
                 table->symbols[j].addr = dynsyms[i].st_value;
                 table->symbols[j].size = dynsyms[i].st_size;
-                XLOG("name: %s, addr: %x, size: %x\n",
+                XLOG2("name: %s, addr: %x, size: %x\n",
                     table->symbols[j].name, table->symbols[j].addr, table->symbols[j].size);
                 j++;
             }
@@ -176,7 +176,7 @@
                 table->symbols[j].name = strdup(str + syms[i].st_name);
                 table->symbols[j].addr = syms[i].st_value;
                 table->symbols[j].size = syms[i].st_size;
-                XLOG("name: %s, addr: %x, size: %x\n",
+                XLOG2("name: %s, addr: %x, size: %x\n",
                     table->symbols[j].name, table->symbols[j].addr, table->symbols[j].size);
                 j++;
             }