use more cpu cores

docker/scripts/install-connectors.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 set -euxo pipefail
+export MAKEFLAGS="-j4"
 
 function cmakebuild() {
   cd $1

docker/scripts/install-dependencies-airspy.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 set -euxo pipefail
+export MAKEFLAGS="-j4"
 
 function cmakebuild() {
   cd $1

docker/scripts/install-dependencies-hackrf.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 set -euxo pipefail
+export MAKEFLAGS="-j4"
 
 function cmakebuild() {
   cd $1

docker/scripts/install-dependencies-limesdr.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 set -euo pipefail
+export MAKEFLAGS="-j4"
 
 cd /tmp
 

docker/scripts/install-dependencies-plutosdr.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 set -euo pipefail
+export MAKEFLAGS="-j4"
 
 function cmakebuild() {
   cd $1

docker/scripts/install-dependencies-rtlsdr-soapy.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 set -euo pipefail
+export MAKEFLAGS="-j4"
 
 function cmakebuild() {
   cd $1

docker/scripts/install-dependencies-rtlsdr.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 set -euxo pipefail
+export MAKEFLAGS="-j4"
 
 function cmakebuild() {
   cd $1

docker/scripts/install-dependencies-sdrplay.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 set -euxo pipefail
+export MAKEFLAGS="-j4"
 
 function cmakebuild() {
   cd $1

docker/scripts/install-dependencies-soapyremote.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 set -euo pipefail
+export MAKEFLAGS="-j4"
 
 function cmakebuild() {
   cd $1

docker/scripts/install-dependencies-soapysdr.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 set -euxo pipefail
+export MAKEFLAGS="-j4"
 
 function cmakebuild() {
   cd $1

docker/scripts/install-dependencies.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 set -euxo pipefail
+export MAKEFLAGS="-j4"
 
 function cmakebuild() {
   cd $1